Lock mechanism for machine guns



H. 0. RUSSELL AND C. L. PAULUS.

LOCK MECHANISM FOR MACHINE GUNS.

APPLICATION FILED JUNE 9,1922.

gwvenfons Mr (9. M W C 60 W405,

Patented Sept. 5, 11922.

HERBERT O. RUSSELL, OF LOS ANGELES, CALIFORNIA, AND CHARLES L. PAULUS, OF DAYTON, OHIO.

LOCK MECHANISM FOR MACHINE GUNS.

Application filed June 9, 1922. Serial No. 567,074.

To all whom it may concern Be it known that we, HERBERT O. RUSSELL and CHARLES LEIGH PAULUs, citizens of the United States, residing, respectively, at Los Angeles and Dayton, in the counties of Los Angeles and Montgomery and States of California and Ohio, have invented certain new and useful Improvements in Look Mechanism for Machine Guns, of which the following is a specification.

This invention relates to lock mechanism for machine guns, the object in view being to provide a means whereby the force necessary to trip the trigger of a machine gun is decreased to such an extent as to permit the trigger to be operated by the trigger motor-of an electrical synchronizing gear.

.With the above and other objects in view, the invention consists in the novel construction, combination and arrangement herein fully described, illustrated and claimed.

T he accompanying drawing is a sectional view of the lock mechanism of a machine un. g The invention consists in modifying the tumbler 1 and trigger 2 of a machine gun by forming the nose 3 of the trigger with a cam face 4 and also forming the notch 5 of the tumbler with a cam face 6 so that the trigger will be normally cammed out of the notch of the tumbler unless the movement of the trigger be resisted. This resistance is produced by a lever 7 which is mounted on a pivot 8 between the ends thereof and formed in one end with a substantially square notch 9 into which fits the correspondingly formed endof the trigger 2 as clearly shown in the drawing. The engagement between the trigger 2 and the lever 7 is such that there is no tendency to cam the tri ger out of the notch 5 of the tumbler.

force exerted by the top end of the trigger against the lever depends upon the angle at which the nose of the trigger and the notch of the tumbler are bevelled and this force at the to end of the trigger ma be made practical y any value desired. he plunger of the electrical synchronizing gear trigger motor, (not shown) operates against a l nder the new arrangement, the

fi aving thus described our invention, we

claim:

1. In lock mechanism for machine guns, the combination of a firing pin, a tumbler for said firing pin having a cam face, a trigger having a portion bearing against said cam face, and a trigger holding and releasing lever having a positive engagement with said trigger and having a projection for cooperationwith the trigger motor of an electricalsynchronizing gear.

2. In lock mechanism for machine guns,

the combination of a firing pin, a tumbler for said firing pin having a cam face, a trigger having a cam faced portion bearing against said cam face and a trigger holding and releasin lever having a positive engagement w1th said trigger and having a projection for cooperation with the trigger motor of an electrical synchronizing gear.

3. In lock mechanism for machine guns, the combination of a .firing pin, a tumbler for said firing pin having a cam face, a. trigger having a portion bearing against said cam face, and a trigger holding and releasing lever having a positive engagement with said trigger and having a projection for cooperation with the trigger motor of an electrical synchronizing gear, the contacting faces of the tumbler and trigger being such that the tumbler may cam the trigger out of holding engagement therewith when the trigger is released by said lever.

In testimony whereof we aflix our signatures.

HERBERT O. RUSSELL. CHARLES L. PAULUS. 

